<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区 -->
      <el-row>
        <el-col>
          <el-button
            type="primary"
            @click="addDialogVisible = true"
          >添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table
        :data="roleList"
        border
        stripe
      >
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template v-slot="scope">
            <el-row
              :class="['bdbottom',i1 === 0 ? 'bdtop':'','vcenter']"
              v-for="(item1,i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row,item1.id)"
                >{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套渲染二级权限 -->
                <el-row
                  v-for="(item2,i2) in item1.children"
                  :key="item2.id"
                  :class="[i2 === 0 ? '':'bdtop','vcenter']"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row,item2.id)"
                    >{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      type="warning"
                      closable
                      @close="removeRightById(scope.row,item3.id)"
                    >{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column
          type="index"
          label="#"
        ></el-table-column>
        <el-table-column
          label="角色名称"
          prop="roleName"
        ></el-table-column>
        <el-table-column
          label="角色描述"
          prop="roleDesc"
        ></el-table-column>
        <el-table-column
          label="操作"
          width="300px"
        >
          <template v-slot="scope">
            <el-button
              size="mini"
              type="primary"
              icon="el-icon-edit"
              @click="showEditDialog(scope.row.id)"
            >编辑</el-button>
            <el-button
              size="mini"
              type="danger"
              icon="el-icon-delete"
              @click="removeById(scope.row.id)"
            >删除</el-button>
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
            >分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 添加角色的对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClose"
    >
      <!-- 内容主体区 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="80px"
      >
        <el-form-item
          label="角色名"
          prop="roleName"
        >
          <el-input v-model.trim="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item
          label="角色描述"
          prop="roleDesc"
        >
          <el-input v-model.trim="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span
        slot="footer"
        class="dialog-footer"
      >
        <!-- 内容底部区 -->
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button
          type="primary"
          @click="adduser"
        >确 定</el-button>
      </span>
    </el-dialog>
    <!-- 修改角色的对话框 -->
    <el-dialog
      title="修改角色"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <el-form
        :model="editForm"
        :rules="editFormFules"
        ref="editFormRef"
        label-width="80px"
      >
        <el-form-item
          label="角色名"
          prop="roleName"
        >
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item
          label="角色描述"
          prop="roleDesc"
        >
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span
        slot="footer"
        class="dialog-footer"
      >
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button
          type="primary"
          @click="editUserInfo"
        >确 定</el-button>
      </span>
    </el-dialog>
    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树形控件 -->
      <el-tree
        :data="rightsList"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defkeys"
        ref="treeRef"
      ></el-tree>
      <span
        slot="footer"
        class="dialog-footer"
      >
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button
          type="primary"
          @click="allotRights"
        >确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: 'Roles',
  data () {
    return {
      //所有角色列表数据
      roleList: [],
      addForm: {
        roleDesc: '',
        roleName: ''
      },
      //添加用户的表单数据
      addFormRules: {
        roleName: [
          {
            required: true,
            message: '请输入角色名',
            trigger: 'blur'
          },
        ],
        roleDesc: [
          {
            required: true,
            message: '请输入角色描述',
            trigger: 'blur'
          },
        ],
      },
      //控制添加角色对话框的显示与隐藏
      addDialogVisible: false,
      //控制修改角色对话框的显示与隐藏
      editDialogVisible: false,
      //控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      //查询到的用户信息对象
      editForm: {},
      //修改表单的验证规则对象
      editFormFules: {
        roleName: [
          {
            required: true,
            message: '请输入角色名',
            trigger: 'blur'
          }
        ],
        roleDesc: [
          {
            required: true,
            message: '请输入角色描述',
            trigger: 'blur'
          }
        ]
      },
      //所有权限的数据
      rightsList: [],
      //树形控件的绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      //默认选中的节点Id值数组
      defkeys: [],
      //当前即将分配角色的Id值
      roleId: ''
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    //获取所有角色的列表
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      this.roleList = res.data
    },
    //点击按钮,添加新用户
    adduser () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        //可以发起添加用户的网络请求
        const { data: res } = await this.$http.post('roles', this.addForm)
        if (res.meta.status !== 201) {
          this.$message.error('添加角色失败')
        }
        this.$message.success('添加角色成功')
        //隐藏添加用户的对话框
        this.addDialogVisible = false
        //刷新用户列表
        this.getRolesList()
      })
    },
    //监听添加用户对话框的关闭事件
    addDialogClose () {
      //重置表单
      this.$refs.addFormRef.resetFields()
    },
    //展示编辑用户的对话框
    async showEditDialog (id) {
      const { data: res } = await this.$http.get(`roles/${id}`)
      if (res.meta.status !== 200) {
        return this.$message.error('查询用户信息失败')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    //监听修改用户对话框的关闭事件
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    //修改角色信息并提交
    editUserInfo () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        //发起修改角色信息的数据请求
        const { data: res } = await this.$http.put(`roles/${this.editForm.roleId}`, {
          roleName: this.editForm.roleName,
          roleDesc: this.editForm.roleDesc
        })
        if (res.meta.status !== 200) {
          return this.$message.error('修改角色信息失败')
        }
        //关闭对话框
        this.editDialogVisible = false
        //刷新用户列表
        this.getRolesList()
        //提示修改成功
        this.$message.success('修改角色信息成功')
      })
    },
    //根据id删除对应的用户信息
    async removeById (id) {
      //弹框询问用户是否删除数据
      const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      //如果用户确认删除,则返回值为字符串 confirm
      //如果用户取消删除,则返回值为字符串 cancel
      //console.log(confirmResult);
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      //发起请求删除用户
      const { data: res } = await this.$http.delete(`roles/${id}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除用户失败')
      }
      this.$message.success('删除用户成功')
      this.getRolesList()
    },
    //根据id删除对应的权限
    async removeRightById (role, rightId) {
      //弹框提示是否要删除
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除')
      }
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败')
      }
      this.$message.success('删除权限成功')
      //this.getRolesList()
      role.children = res.data
    },
    //展示分配权限的对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      //获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败')
      }
      //把获取到的权限数据保存到data中
      this.rightsList = res.data
      //递归获取三级节点的id
      this.getLeafKeys(role, this.defkeys)
      this.setRightDialogVisible = true
    },
    //通过递归的形式,获取角色下所有三级权限的id并保存到defKeys数组
    getLeafKeys (node, arr) {
      //如果当前节点不包含children属性则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    //监听分配权限对话框的关闭事件
    setRightDialogClosed () {
      this.defkeys = []
    },
    //点击为角色分配权限
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败')
      }
      this.$message.success('分配权限成功')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  },
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
  margin-left: 60px;
}
</style>